Complete model to simulate the thermal defocusing of a laser beam focused in water

被引：28

作者：

Richerzhagen, B

Delacretaz, G

Salathe, RP

机构：

[1] Ecole Polytechnique Fédérale, Lausanne Laboratoire d'Optique Appliquée

来源：

OPTICAL ENGINEERING | 1996年 / 35卷 / 07期

关键词：

thermal defocusing; thermal lenses; self-focusing; self-defocusing; thermal blooming; finite elements; ray tracing;

D O I：

10.1117/1.600995

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The effect of thermal defocusing of a pulsed Nd:YAG laser beam focused in a water cell is observed by a shutter video camera as a function of the position in the cell and the time during the laser pulse, In a first case the laser beam is directly focused into the water. In a second experiment the beam is coupled into a multimode fiber and the fiber output focused into the cell, A theoretical model is proposed explaining the observed phenomena. The simulation shows results that are in very good agreement with the measured values. (C) 1996 Society of Photo-Optical instrumentation Engineers.

引用

页码：2058 / 2066

页数：9

共 18 条

[1]

Akhmanov S. A., 1972, LASER HDB, P1151

[2] THERMAL SELF-ACTIONS OF LASER BEAMS [J].